Trojan demands US$10.99 ransom to free files

A new Trojan horse demands a US$10.99 ransom payment to stop erasing files on the infected PC's hard drive, a security firm said Thursday.

According to UK-based Sophos, the Ransom.a Trojan freezes the computer, then puts up a message saying it will delete files every half hour until the user sends US$10.99 via Western Union to a designated account.